Abstract: To provide initiators in two components having no discoloring after polymerization and excellent polymerization-curability under the existence of water, and provide a polymerizable composition using the initiators in two components. The initiators in two components is for polymerizing and curing a (meth)acrylate compound, and the initiator includes (a) a peroxide being compatible or soluble with water, (b) an aromatic sulfinic acid compound, (c) a tert-amine compound, and (d) water. The polymerizable composition uses the initiators in two components. Particularly, preferably, the polymerizable composition includes a first component and a second component. The first component comprising (a) a peroxide being compatible or soluble with water, and a (meth)acrylate compound, and the second component includes (b) an aromatic sulfinic acid compound, (c) a tert-amine compound, and (d) water.

Abstract: For accurate holding, easy attachment and detachment, and sufficient rotation force, a rotary tool has a holding and transmitting part 1 to hold a hexagonal column of a rotated body and give rotation force, comprising a recessed part 2, which has an inner face having an approximately regular triangle cross sectional shape, run-off parts 2a at corners of the triangle shape, and a uniform shape in depth direction, and plate springs 3, which are fixed at a bottom of the recessed part 2 and have pawl parts 3a at tips thereof positioned at the opening side of the recessed part 2, and the pawl parts 3a can be moved into the run-off parts 2a while contacting to three side faces of the hexagonal column H and generate spring force, when the hexagonal column H is inserted into the recessed part 2.

Abstract: A method for creating three-dimensional data of a position of an outer periphery at the occlusal surface side of a keeper includes steps of placing a keeper analog 2 having a reference plane 2a in same shape as and in parallel to a surface Ka at the occlusal surface side of a keeper K to be embedded projectingly on an abutment model 1, three-dimensionally measuring an outside shape of the abutment model 1 having the keeper analog 2, acquiring a normal vector 2aa and an outer periphery 2ab of the reference plane 2a based on the measured three-dimensional data, moving the outer periphery 2ab to a position 3 at the abutment model 1 side by a height 2b of the keeper analog 2 from the reference plane 2a along the normal vector 2aa and acquiring three-dimensional data of the outer periphery Kb based on the position 3.

Abstract: To provide a sheet for guiding regeneration of mesenchymal tissue having improved formability, strength, absorbability and efficiency, the sheet is produced by steps of containing a culture medium in a surface of a porous sheet produced by freezing a bioabsorbable polymer material dissolved with an organic solvent and drying it, seeding a mesenchymal cell grown after taking from biotissue, and differentiating the mesenchymal cell to a mesenchymal tissue precursor cell, where the mesenchymal tissue precursor cell and an extracellular substrate are adhered on the surface of the porous sheet containing a culture medium, and the extracellular substrate is secreted in a process of the mesenchymal cell being differentiated to the mesenchymal tissue precursor cell.

Abstract: For certainly handling a screw member, a screw member 1 includes a male screw 2, and an inner peripheral face of the hole 4 has an engaging recessed part 5 to be engaged with an engaging projected part 11 of a tapered engaging part 10 of a rotary tool 9, and a stepped part 6, said inner peripheral face is parallel or make close to a center axis 7 of the screw member 1 from the head part 3 in a direction of the male screw and from the stepped part 6 in the direction of the male screw, and head part side end edge 8a and an end edge of the stepped part 8b to be engaged with the engaging projected part 11 have an angle of said inner peripheral face being 90±5 degrees with respect to the head part 3 and the stepped part 6.

Abstract: To provide an organic and inorganic composite filler which gives excellent surface smoothness similar to that of a natural tooth, low polymerization shrinkage, high X-ray imaging property and high mechanical strength to a dental restoration material composite, an organic and inorganic composite filler used for a dental restoration material is produced by curing and pulverizing a (meth)acrylate compound including 50 to 80% by weight of a glass powder having a maximum particle diameter of 5 ?m or less, an average particle diameter from 0.05 to 2 ?m, and X-ray imaging property, and 10 to 40% by weight of a metal compound having an average particle diameter from 0.005 to 0.3 ?m and X-ray imaging property at the maximum of 90% by weight in total, where the organic and inorganic composite filler has preferably an average particle diameter from 10 to 30 ?m.

Abstract: To provide a dental root canal-filling composition which is generally formed in a point shape, has high strength, is properly deformed so as to afford easy operativity for filling in a root canal, has improved wetting and adhering properties with a root canal-filling sealer and is less deteriored by sterilization or chemical disinfection, the dental root canal-filling composition comprises one or more kinds of polyolefin resins selected from the group of polyethylene, polypropylene, and a copolymer of polyethylene and polypropylene, a styrene block copolymer, one or more kinds of thermoplastic resins selected from the group of ester gum, rosin, an alicyclic saturated hydrocarbon resin, a terpene resin, and an aliphatic petroleum resin, and one or more kinds of inorganic fillers selected from the group of zinc oxide, barium sulfate, zirconium oxide, titanium oxide, ytterbium fluoride, a barium glass, and an aluminosilicate glass.

Abstract: A pretreatment kit and a pretreatment kit for saliva in identification and quantitative determination of Streptococci mutans by immunochromatography utilizing an antigen-antibody reaction, which can remove aggregation caused by mucin and chain formation of Streptococci mutans in saliva in a simple operation and can efficiently flow out a complex of a labeled antibody and Streptococci mutans from a porous membrane retaining the labeled antibody, contains (A) a 0.01 to 10 mol/L aqueous solution of sodium hydroxide, (B) a 0.01 to 3 mol/L aqueous solution of tartaric acid and/or citric acid, and (C) a nonionic surface active agent and/or an amphoteric surface active agent, in which the component (C) is mixed with the components (A) and/or (B), or is provided separately, and at least one substance selected from the particular metallic salts is contained in at least one of the components (A), (B) and (C) in an amount of 5 to 25% by weight.

Abstract: A hydrophilic organopolysiloxane composition of the hydrosilylation reaction cure type for use as dental impression material is characterized by comprising as essential components (A) a diorganopolysiloxane having at least 0.1 silicon-bonded alkenyl group in a molecule, (B) a liquid or solid organopolysiloxane having average compositional formula (1), comprising SiO2 units and R3SiO1/2 units (R is a monovalent hydrocarbon, alkoxy or hydroxyl group) and having a viscosity of at least 10 mPa·s at 23° C., (C) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule, (D) a hydrosilylation catalyst, and (E) a polyether having average compositional formula (2).

Abstract: To provide a dental glass ionomer cement for a sealer to be used for sealing a gap between a gutta-percha point filled in a root canal in a dental root canal treatment and a root canal wall, with a prolonged setting time and with sufficient setting property even in a root canal having much water content, the dental cement for a sealer includes a polymer of ?-? unsaturated carboxylic acid, oxide powder capable of reacting with the polymer of ?-? unsaturated carboxylic acid, and water, and further includes an organic acid salt of metal selected from Mg, Ca, and Sr and/or a hydroxide of metal selected from Mg, Ca, and Sr.

Abstract: To provide a dental restorative material composition using an organic-inorganic composite filler having excellent surface smoothness like a natural tooth, low polymerization shrinkage, excellent X-ray contrast imaging property, similar transparency to that of a natural tooth, and no variation of transparency before and after the composition is hardened, the dental restorative material composition includes (a) a (meth)acrylate monomer, (b) an organic-inorganic composite filler having an average particle diameter of 5 to 50 ?m which is made by mixing a (meth)acrylate monomer and a fine particle filler having an average primary particle diameter of 0.005 to 0.3 ?m and having X-ray impermeability, (c) a fine particle filler having an average primary particle diameter of 0.005 to 0.04 ?m, and (d) a photopolymerization initiator.

Abstract: To provide a paste-type dental cement capable of being used properly for temporary adhering or temporary filling, a paste-type dental cement, which comprises a phosphoric acid and/or a polymer of ?-? unsaturated carboxylic acid, an oxide powder capable of reacting with the phosphoric acid and/or the polymer of ?-? unsaturated carboxylic acid, and a water, further includes a liquid not reacting with the oxide powder.

Abstract: To prevent photo-activation of a photopolymerization catalyst in pastes of an adhesive for a dental bracket in a mixing tip and to enable a dentist to visually confirm the pastes, a mixing tip includes a housing (2) having a mixing element (1), a paste guiding member (3) fixed to the housing (2), and a locking member fixed or integrally formed on the paste guiding member (3) or the housing (2), the guiding member includes paste inlets (3a) and flow path parts (3b), the locking member has a pawl part locked with a locking hole of the syringe holder and a projection part inserted to a hole part of the syringe holder, or has two pawl parts locked with two locking holes, and the housing (2) and the paste guiding member (3) are made of a colored plastic material only transmitting light except light having the photo-activating wavelength.

Abstract: To provide a fixture mount fixing tool for preventing damage of a fixture in the storage container, when a fixture mount and the fixture are engaged, the fixture mount fixing tool includes a top part (2) having a bolt insertion through-hole (1) and a droop part (3) drooped therefrom, the bolt insertion through-hole (1) includes an engagement hole (4) engaged with a regular polygonal-shaped part (Zb) formed on an end part outer face of the fixture mount (Z), and/or the droop part (3) includes engagement faces contacted with plane parts on an outer face of the fixture mount (Z),and the droop part (3) includes a locking part (3b) locked with a container holding hole of a base table for holding the storage container (Y) or a locking part (3b) locked with engagement part formed on the side face of the container (Y).

Abstract: To provide a bone graft substitute having an appropriate absorption period in a living body and high osteoconductivity, the bone graft substitute contains a carbonate apatite and an osteoinductive factor, the osteoinductive factor is preferably at least one kind selected from a group including BMP (a bone morphogenetic protein), GDF (a growth differentiation factor), TGF-? (a transformation growth factor), FGF (a fibroblast growth factor), IGF (an insulin-like growth factor), PDGF (a platelet-derived growth factor), BDNF (a brain-derived nerve growth factor), and NGF (a nerve growth factor), and the bone graft substitute has open pores, preferably having a diameter of 50 to 1000 ?m and/or a diameter of 0.001 to 5 ?m, with porosity of 20 to 80%.